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<br /> SOUTHWESTERN LABORATORIES <br /> Page 2 of 3 <br /> SCOPE OF SERVICES <br /> We propose to observe removal of the pavement materials and perform <br /> tests to evaluate the properties of the pavement base and utility <br /> backfill. Engineers experienced with pavement evaluations and failure <br /> investigations will provide on-site visual observation and will direct the <br /> field testing program, <br /> Field tests will include base thickness checks, moisture/density tests <br /> of the base, subgrade and backfill to evaluate the state of compaction and <br /> possibly field California Bearing Ratio (CBR) tests. Documentation of <br /> existing conditions and conditions during removal of the pavement will be <br /> maintained through 35mm photographs which will include descriptions and <br /> dates. Laboratory tests will be performed on representative samples to <br /> evaluate properties of the base and subgrade. Tests will include <br /> Atterberg limits, sieve analysis and possibly wet ball mill, Results of <br /> these tests will provide documentation of the engineering properties of <br /> the subgrade and quality of the base materials, They will also provide <br /> information necessary for evaluation of pavement thickness, <br /> All data will be analyzed by registered professional engineers to <br /> determine the following: <br /> 1. Adequacy of the design pavement thickness for anticipated traffic <br /> loads and frequencies which have been experienced, <br /> 2. Adequacy of base and sub grade compaction in terms of moisture <br /> content, density and uniformity throughout the section. <br /> 3. Compaction of utility bedding and backfill. <br /> These factors will provide documentation of the "as-built" pavement <br /> section, We will review this data along with existing conditions at the <br /> site to render an opinion as to the cause of the distress. <br /> A written engineering report will be prepared by our registered <br /> professional engineers, who are experienced in pavement design and <br /> evaluations and are familiar with the local conditions. The report will <br /> include descriptions of conditions encountered (including photographs), <br /> results of laboratory field tests and our opinions regarding causes of the <br /> pavement distress. <br />